Generation of Phase-Only Holograms Based on Aliasing Reuse and Application in Holographic See-Through Display System

Abstract

In the point-based method, the aliasing phenomenon in the hologram plane is usually considered as a harmful phenomenon because it will degrade the reconstructed image quality. In this paper, the advantage of the aliasing phenomenon is employed to improve the reconstructed image quality of the phase-only hologram. Through analysis of the principle of this phenomenon, we proposed a method to improve the reconstructed image quality of the phase-only hologram. By controlling the strength of the aliasing, the amplitude distribution in the hologram plane can be turned into a nearly uniform distribution. It is helpful to generate an optimized phase-only hologram, which results in higher quality of the reconstructed image because the effect of lost information caused by abandon the amplitude part can be diminished. Moreover, a holographic see-through display system is designed to demonstrate the effectiveness of the proposed method.

49.3: A Modified Unsupervised Vision Transformer Network for High‐fidelity Computer‐generated Holography

“…To provide accurate accommodation cues for human eyes, conventional physically based CGH algorithms such as pointcloud and polygon-based methods require to process enormous amount of data [3][4][5]. Numerous algorithms have been proposed to accelerate CGH calculation and optimization.…”

Convolutional Neural Network for Phase-Only Hologram Optimization Based on the Point Source Method With the Holographic Viewing-Window

“…where ϕOCP is the OCP matrix, ⊗ represents the convolution operation, 2 2 2 r x y z = + + , and z is the distance between the hologram plane and the object plane, which the distance needs to satisfy Eq. (2).…”

“…olographic display technology has been widely used in the research of augmented reality (AR) and near-eye displays (NED) in recent years [1], [2]. Since the spatial light modulator (SLM) can only modulate amplitude or phase, the encoding methods of computer-generated hologram (CGH) can be divided into amplitude-type and phase-type.…”

Generation of Non-Iterative POHs based on Optimized Hybrid Phase for Fresnel Lensless Holographic Projection

“…One such algorithm is the Time-Division Multiplexing (TDM) [28], which employs high-speed switching and display of different holograms by using SLMs to reconstruct holograms. Another algorithm, which can generate reconstructed images in relatively high quality, is the Complementary Phase-Only Holograms algorithm [29,30]. However, these algorithms come with challenges such as high computational complexity and the requirement for high-performance SLMs.…”